JP2000107156A - Authentication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To specify easily iris data of a person to be identified by synthesizing an identification code at a time when iris data of a person to be identified obtained with an iris camera are stored and a video image photographed with a video camera and videoing. SOLUTION: An image processing section 18 is comprised of an integrated circuit or the like for image processing and performs image processing at high speed. A photographed image is input to an iris data processing section 9 from the image processing section 18, and a dynamic object is detected from a time difference of images photographed with a camera 16 and a camera 17. A moving object contained in the images is detected by a timewise change of the images photographed with both cameras, and it is judged whether the moving object is a human or not. In this case, if it is judged to be a human, after the head is detected, the positions of the eyes are detected, and taking advantage of the near symmetry of the composition of the face, templates of the eyes, nose, mouth and cheeks and others are prepared and collated with the person for adjustment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a personal identification device for photographing an iris of a human eye to identify each person.

[0002]

2. Description of the Related Art An iris of a human eye has a characteristic that each individual can be identified in the same manner as a fingerprint.
Various techniques have been developed for taking pictures of human eyes, acquiring iris data, and managing entrances and exits of building gates.

[0003]

However, the above-mentioned prior art has the following problems to be solved. When a burglary enters a convenience store, post office, bank, or the like, the action is generally recorded on a video using a surveillance camera and used for criminal investigation. However, since a robber usually covers his face with a mask or the like, it is not easy to confirm whether the person whose video has been recorded matches the suspect. On the other hand, since the eyes are exposed, the determination can be made by comparing the iris data.

However, when the iris data of a person approaching a specific place is automatically obtained and stored in a storage device, the iris data obtained by
It is not easy to determine whether the criminal who recorded the video is the same person. That is, even if the recording time coincides with the iris acquisition time, it is not clear just by looking at the iris data which of the persons in the store the iris data acquisition device acquired the iris data at that time. Therefore, its evidential ability was a problem.

[0005]

The present invention employs the following structure to solve the above problems. <Structure 1> An iris camera that captures the eye of the identified person in order to acquire iris data from an image of the eye of the identified person existing in the monitoring area, and irradiates a spot to the identified person during the acquisition of the iris data. A spot light source, a video camera that captures an image of the identified person who illuminated the spot in the monitoring area, and an identification code when the iris data of the identified person obtained using the iris camera is stored in a storage device. A personal identification device, comprising: a recording device that synthesizes a video image captured using the video camera and records the video.

<Structure 2> In the personal identification device described in Structure 1, as the light source of the iris camera, an iris light source for irradiating invisible light to the eyes of the person to be identified and a spot light source for irradiating a visible light spot to the person to be identified. A personal identification device comprising:

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below using specific examples. <Specific Example> FIG. 1 is a schematic diagram of a personal identification device according to the present invention. The personal identification device of the present invention clarifies the relationship between the video of a person during video recording and the acquired iris data. Therefore, it can be used as a combination of a monitoring camera and an iris acquisition device, for example, as a security device for a convenience store. This figure shows a state in which iris data is acquired when the identified person 1 approaches the counter 2 having a cash register. This device includes a video camera 3,
An iris camera 4 and a spot light source 5 are provided.

The above video camera 3, iris camera 4,
The spot light source 5 is attached to, for example, a wall (not shown) on the back of a cash register of a convenience store. The video camera 3 captures an image of the interior of the store using, for example, an automatic swing device. The iris camera 4 is set, for example, to capture the identified person 1 standing in front of the cashier counter 2 and acquire iris data.

The video camera 3 is a well-known surveillance camera for photographing the entire surveillance area including the person to be identified 1. When the identified person 1 approaches the counter 2, the iris camera 4 detects the approach, automatically focuses on the eyes 6 of the identified person 1, zooms in, and acquires an image of the eyes. The spot light source 5 is composed of, for example, a visible light laser or the like, and illuminates a spot 7 of, for example, a red color on the face or body of the identification target 1. The spot light source 5 operates so as to hit the spot 1 on the identification target 1 while acquiring iris data by the iris camera 4.

The video image taken by the video camera 3 is
The recording is performed by the recording device 8. In addition, the image of the eye photographed by the iris camera 4 is sent to the iris data processing unit 9 and subjected to image processing to obtain iris data. This iris data is stored in the iris data file 12 of the storage device. The iris data has a known function of coding an image of the iris of the eye and using the coded image as data for personal identification. This technology is described in, for example,
166 publication.

A monitor 11 is connected to the recording device 8, for example, as shown in FIG. This monitor 11 has
An image to be video-recorded on the recording device 8 is displayed. Here, the identification target 1 and the identification code 13 present in the monitoring area 10 are shown. Identification code 13
Is a number or a code assigned to identify each iris data when the obtained iris data is stored in the iris data file 12. This is superimposed and incorporated into the video to be recorded.

Therefore, the iris data of the identified person 1 is
The video shows that the identification code 13 displayed at the same time is attached and stored in the iris data file 12. Also,
This image also shows the spot 7 illuminated on the person 1 to be identified, and it is clear that the acquired iris data belongs to the person 1 to be identified.

FIG. 2 is a block diagram showing a specific example of the apparatus of the present invention. The device as described above is specifically constituted by functional blocks as shown in FIG. First, the device is provided with a light source 15 that illuminates the entire area to which the person to be identified approaches. Further, two cameras 16 and 17 are provided for detecting the approach of the identified person and measuring the distance. These cameras 16 and 17 input to the image processing unit 18. The image processing section 18 is provided with a video capture 19.

The iris camera 4 described above is provided with a focus mechanism 14 for automatically focusing on the eyes of the identified person. The iris camera 4 is constituted by, for example, a CCD camera or the like. The output of the iris camera 4 is input to the video capture 21 of the iris data processing unit 9 and processed. The iris data processing unit 9 is configured to control the spot light source 5 described above, the near-infrared laser 23 which is a light source for photographing the iris camera 4, and the like. The near-infrared laser 23
This is a light source for photographing of the iris camera 4.

Further, several half mirrors 24, 2 are provided on the optical path of the discriminated person so that the beam of the spot light source 5 or the beam of the near-infrared laser 23 is irradiated on a predetermined portion of the person to be identified.
5, 26 are arranged. And the pan-tilt mechanism 2
7, the angles of these half mirrors 24, 25, 26 are controlled, and the near-infrared laser 2
The iris camera 4 is controlled so that the three beams are accurately irradiated and the reflected light is input to the iris camera 4. The beam of the spot light source 5 is also controlled at the same time, and irradiates the face and body of the identified person. In this example, since the beam is controlled using the same optical system, the beam of the spot light source 5 is applied to the eye of the discriminated person immediately near the eye.

The iris data obtained by the iris data processing unit 9 is stored in the iris data file 12 described above.
Is stored in In addition to the above, the output of the video camera 3 already described is output from the superimposition unit 28 of the recording device 8.
Is input to the video recorder 29 through the. The identification code of the iris data described above is input to the superimpose unit 28 from the iris data processing unit 9.

The above device operates as follows. First,
The video camera 3 sequentially photographs the inside of a large convenience store using a swing device or the like. Figure 1
When approaching the counter 2 as shown in FIG. 2, the light source 15 shown in FIG. The light source 15 has a visible light cut filter mounted on a near-infrared light emitting diode, a halogen lamp, or the like, and irradiates the identified person with light that is invisible to the naked eye of the identified person. Identified person is camera 1
The video output is input to the video capture 19 when the camera enters the shooting range of 6, 17. That is, the cameras 16 and 17 can photograph the identification target irradiated with the near-infrared light.

The image processing section 18 is composed of an integrated circuit for image processing, etc., and performs image processing calculations at high speed. The captured image is input from the image processing unit 18 to the iris data processing unit 9. First, the iris data processing unit 9
A dynamic object is detected from a time difference between images captured by the cameras 16 and 17. That is, a moving object included in an image is detected based on a temporal change of the video shot by both.
Then, it is determined whether the moving object is a human.

In this case, the shape of the silhouette of the moving object or the like is used as a parameter for determination. If it is determined that the person is a human, the head is detected, and then the position of the eyes is detected. Utilizing the fact that the composition of the face is nearly symmetrical,
The above determination is made by preparing a template for the mouth, cheek and the like, and checking it against the template.

Next, the distance from the cameras 16 and 17 to the identified person is calculated. This is obtained from the video difference between the cameras 16 and 17. The difference is large when the identified person is at a short distance, and the difference is small when the identified person is at a distant position. By obtaining the relationship between the difference amount and the distance in advance, the distance to the identified person can be calculated at high speed.

After recognizing the position of the eye of the identified person, the iris data processing section 9 controls the pan / tilt mechanism 27 to drive the half mirrors 24, 25, and 26 to move in the direction of the eye of the identified person. The beam of the near infrared laser 23 is directed. At the same time, the focus mechanism 14 zooms in and focuses on the eye of the identified person, and captures an image of the iris portion of the identified person.

At this time, the spot light source 5 is turned on at the same time. By adjusting the position of the spot light source 5 in advance, it is possible to specify to which part of the identification target 1 the spot 7 shown in FIG. The eye image obtained by the video capture 21 is processed by a known method described above to obtain iris data.
This iris data is stored in the iris data file 12 in association with the identification code.

At the same time, the identification code is sent to the superimpose section 28 of the recording device 8. Video camera 3
As described above, the spot 7 is illuminated as described above, and at the same time, the video of the identified person with the identification code of the iris data superimposed is recorded on the video recorder 29. For example, if the spot 7 is a spot of red color, its existence can be easily understood when a video is recorded. In this way, the video images of all customers approaching the location of the counter 2 shown in FIG. 1 can be stored in association with the acquired iris data. If a robbery or the like occurs, this video recording is used.

FIG. 3 is a diagram for explaining the evidential ability of a video. As shown in this figure, it is assumed that the person to be identified 1 exists in the monitoring area, and that the iris data 20 has been acquired. In this case, the spot 7 is illuminated only to a person who has acquired iris data among a plurality of persons existing in the monitoring area. This clarifies which person's iris data has been obtained. In addition, since the identification code 13 necessary for storing the iris data 20 is superimposed in the recorded image, it is clear which iris data belongs to the subject 1 by this image. Therefore, the iris data 20 stored in association with the identification code 13 can be taken out and used for identity verification.

The present invention is not limited to the above embodiment. In the above example, an example in which the personal identification device of the present invention is applied to a security device has been described. However, a device for acquiring iris data automatically focuses on a person approaching the device and acquires an image of the eye. When a plurality of people approach, it is effective to use the above-described method of the present invention to later confirm which person's iris data has been acquired. Therefore, the present invention can be effectively used in various entry management and other situations.

In the above example, iris data is obtained by a near-infrared light source, and a visible light laser beam is applied to a discriminated person to hit a spot. However,
For example, when the surveillance camera is an infrared camera, the spot may be irradiated with an infrared laser beam. Further, the laser for irradiating the eyes for acquiring the iris data can be changed to an ultraviolet laser or the like.

Incidentally, the ultraviolet light here has a wavelength of 4 to 40.
0 nanometer (nm), near-ultraviolet light has a wavelength of 300-4
The description has been made on the assumption that the wavelength ranges from 400 nanometers to 400 nanometers for visible light, from 750 to 2500 nanometers for near-infrared rays, and from about 750 to 1,000,000 nanometers for infrared rays.

[0028]

As described above, while acquiring the iris data of the discriminated person existing in the monitoring area, irradiating the spot to the discriminating person whose iris data is being acquired, the discriminated person who illuminated the spot is moved by the camera. If the iris data is synthesized with the video image by combining the iris data with the video image, it becomes easy to specify the iris data of the discriminated person photographed by the video camera later. Become capable.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a personal identification device according to the present invention.

FIG. 2 is a block diagram of a specific example of the device of the present invention.

FIG. 3 is an explanatory diagram of a video evidence ability.

[Explanation of symbols]

 Reference Signs List 1 identified person 3 video camera 4 iris camera 5 spot light source 6 eyes 7 spot 8 recording device 9 iris data processing unit 10 monitoring area 12 iris data file 13 identification code

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Manji Matsushita 1-7-12 Toranomon, Minato-ku, Tokyo Oki Electric Industry Co., Ltd. F-term (reference) 4C038 VA07 VB04 VC05 5B043 AA09 BA04 DA04 DA05 EA11 GA19 5C054 AA01 CA06 CC06 CF06 CH04 FC01 FC11 FC13 FC14 FC15 FE16 GA01 GB01 HA18

Claims (2)

[Claims] 1. An iris camera for photographing an eye of an identified person in order to acquire iris data from an image of the eye of the identified person existing in a monitoring area; A spot light source to be illuminated, a video camera for photographing a person to be illuminated with the spot in the monitoring area, and an identification code when iris data of the person to be identified obtained by using the iris camera are stored in a storage device. And a recording device for synthesizing a video image captured by using the video camera and recording the video. 2. The personal identification device according to claim 1, wherein, as a light source of the iris camera, an iris light source that irradiates invisible light to an eye of the identified person and a spot light source that irradiates a visible light spot to the identified person. A personal identification device, comprising: